at it when it happens. >> reporter: marco rubio dismissed the president's plan. guns are not the problem. criminals with evidence nil their heart is. what's in the plan? a ban on military style assault weapons, limits op high-capacity magazines, that might have reduced the number of victims in recent shootings, universal background checks that could have prevented the columbine high school gunman from purchasing from a private seller. >> this is our first task as a society. keeping our children safe. >> reporter: to reinforce that point, mr. obama shared the stage with four children who had written letters to him since newtown. >> on the letter that julie wrote me, she said i know that laws have to be passed by congress. but i beg you to try very hard. julie, i will try very hard. >> also greeting the president, 10-year-old teja goode. >> you don't want to lose your life over one little thing, luke a bullet. >> reporter: before signing nearly two dozen executive actions, the president called on americans to ask representatives what's more important? >> doing whatever it takes to get an "
